Sewing-machine.



J. LARSEN.

SEWING MACHINE;

APPLICATION FILED JULY 16, 1912.

1,172,373. Patented Feb. 22, 1916 2 SHEETS-SHEET 2- .7 van for: Wdnesses Wilda/m1? md fl Z W f Ha'm THE cqLl/MBIA PLArynaRAPH co.,WASHINGTON, D. c.

JULIUS LARSEN, or COPENHAGEN, DENMARK.

sewmameem.

imialev's.

A sumes filed m 16, 1912. seriai no. 769,866.

at Copenhagen, Denmark, Frederik VIIs' Grade No. 18, have inventedcertain new and useful Improvements in Sewlng-Machines,

of which the following is a specification.

The present invention refers to a device in sewing machines for sewingboth thick and thin work.

The special characteristic feature of the invention consists of a radialsupport for the bow-shaped needle, making it possible to use abow-shaped or bent needle for sew-' ness of the piece of work to besewn;

Bow-shaped or bent needles, of the ordinary machine needle type,with aneye in the point, have hitherto not been used, notwithstanding that inmany cases they would remedy. a great deficiency in sewingmachines'bo't'hfor thin and thick leather work, and this is doubtlessdue'to the fact that for fine work the needle must be very fine and inmany cases very much. bent; but for thick work requiring a curvedneedle, a socalled hook needle has been used which has a hook in itspoint. This kind of needle cannot however be used as a needle in thecommon meaning of the wordan instrument which punctures the workbut itis only used as a' catch or'hookwhich carries the thread through a holealready punctured in advance by means of a square awl.

The difliculty in using fine, strongly curved needles, consists in thepressure between the point and, the needle-holder,.

being exerted in the direction of the chord of the needles arc, and ,theobject of the present invention is to give the needle an extra supportat the central point of the arc, thus relieving the tension at thispoint and preventing the needle from breaking. This makes it possible touse a bow-shaped or curved needle in sewing even the thickest leatherwork, without the previous use of an awl.

This invention is shown on the accompanying drawing, which shows asewing machine furnished with this device.

Figure l is a side view of the machine.

Fig. 2 is a front View of the same.

On an upright bar 1 there is disposed a sliding collar 2, which can be'moved up and down by means of a crank pin 5 on the axle 3, the crank pin5 being surrounded by ,a

Speeification of Letters Patent. 1

mg, without respect to the nature or thick-.

Patented Feb. 22, 1916.

block l which travels in a slide 6 on the collar 2. On the collar thereare disposed shoulders 7, which form a bearing for the arm '8, which bymeans ofa pin 9 is movably connected with the shouldersThe rap: srarnsra rnr amen lower end of the arm 8 is by means of a If pin 10connected with the needle holder 11,

which is pivoted on the pin 12. -The outer end of the needle holderwhere the bow- "shaped, or curved needle is arranged, will thus describean arc of a circle whose center is the pin 12. j

Onthe pin 12 thereis movably disposed a needle guide or support 14,which'has a slide surrounding the needle 13. f This needle guide orsupport 1% can travel down ward until it reaches the pressure foot 15,but its upward movement is by means of a stop 25*restricted' to theposition shown in Fig. 1.

, flhepresser or pressure foot 15 is'fixed to; the pin '12, and onthi'sipin there is I also fixeda beak 16. The free end of this beak slides ona sloping plane on the block17, which can. move back and forth under theefiect of the arm 18, disposed onthe axle 19,

'which passes through a slide or slot in the collar 2. On the other endof the axle'19 there is an arm 22, whose free end presses against a camon the axle 3, against which it is held pressed by a spring 20. Underthe pressure foot 15 there is disposed on the outer side of the slidingcover, a feeder, whose point 21 is moved up and down and sidewise bymeans of suitable mechanism from the axle 3. By the movementof thearm'18 the block 17 is pushed to the left and lifts the beak 16,causingthe pressure foot 15 to press down the piec e'of work firmly.Then the collar 2 passes downward and presses by means of the arm 8against the needle holder 11. v

VAt the moment when the point of the needle touches the piece of work,which offers resistance to the further passage of the needle, thereoccurs a tension on the curved needle, but this tension is relieved bythe needle support or guide 14, the arc of the bow-shaped needle beingpreserved unaltered and the point of the needle being forced through thepiece of work, while the V needle support or guide accompanies theneedle until it has reached the pressure foot 15, where it remains. Onthe upward movement of the needle, either the needle itself or a littlespring 24 will press the needle in Fig. 1. After this the block: 17returns to its original position and the beak is there-.

by caused. to release the pressure foot 15, so hat the feeder can feedthe work forward.

The needle guide must accompany the needle during its downward movementas when the point of the needle presses against the leather thecurvature of the needle is increased owing to the pressure of the needleholder and as the hole in the needle guide fits nicely for one cuwatureof the needle the needle cannot pass freely when the curvature isslightly changed and the needle guide will therefore move downwardtogether with the needle. dles with various arcs the needle guides mustbe changed as only one guide can be used in connection with. a needlehaving a particular are.

l hat I claim, and desire to secure by Let--.

ters Patent, is: r

l. in a sewing machine, a needle holder, 21- curred needle held bysaidneedle holder, a presser toot serving as a guide for the nee-- dle,and a freely movable guide disposed between the presser foot and theholder which, if the curvature of the needle alters under pressure,moves downward owing to the hen using nee pressure of the needle andsupports the needle during its penetration of the work.

2-111 a sewing machine, a needle holder, a curved needle held'by saidneedle holder,

a presser foot serving as a guide for the when the needle assumes itsnormal curve-- ture.

' 3. In a sewing machine, a needle holder, a curved needle held thereby,a presser foot also serving as a guide for the needle, a guide servingto supportthe needle between the holder and the presser toot, an uprightbar forming part of the machine, a collar slidably mounted on said bar,means for moving said :collar, and a pivoted bar con,

'necting said collar with the needle holder for operating the latter.

Intestimony 'hereof I affix my signature inpresence of two witnesses. VJULIUS LARSEN.

:Nitnesses:

CHARLES, Hons, JISTRAM Wotsme.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D, C.

